

function Node(id, pid, name, url, title, target, icon, iconOpen, open) {

    this.id = id;

    this.pid = pid;

    this.name = name;

    this.url = url;

    this.title = title;

    this.target = target;

    this.icon = icon;

    this.iconOpen = iconOpen;

    this._io = open || false;

    this._is = false;

    this._ls = false;

    this._hc = false;

    this._ai = 0;

    this._p;

};



// Tree object

function dTree(objName) {

    this.config = {

        target					: 'main',

        folderLinks			: false,

        useSelection		: true,

        useCookies			: true,

        useLines				: true,

        useIcons				: true,

        useStatusText		: false,

        closeSameLevel	: false,

        inOrder					: false

    }

    this.icon = {

        root				: '',

        folder			: '',

        folderOpen	:'',

        node				: '',

        empty				: mypath + 'tree/empty.gif',

        line				: mypath + 'tree/line.gif',

        join				: mypath + 'tree/join.gif',

        joinBottom	: mypath + 'tree/joinbottom.gif',

        plus				: mypath + 'tree/plus.gif',

        plusBottom	: mypath + 'tree/plusbottom.gif',

        minus				: mypath + 'tree/minus.gif',

        minusBottom	: mypath + 'tree/minusbottom.gif',

        nlPlus			: mypath + 'tree/nolines_plus.gif',

        nlMinus			: mypath + 'tree/nolines_minus.gif'

    };

    this.obj = objName;

    this.aNodes = [];

    this.aIndent = [];

    this.root = new Node(-1);

    this.selectedNode = null;

    this.selectedFound = false;

    this.completed = false;

};



// Adds a new node to the node array

dTree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open) {

    this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title, target, icon, iconOpen, open);

};



// Open/close all nodes

dTree.prototype.openAll = function() {

    this.oAll(true);

};

dTree.prototype.closeAll = function() {

    this.oAll(false);

};



// Outputs the tree to the page

dTree.prototype.toString = function() {

    var str = '<div class="dtree">\n';

    if (document.getElementById) {

        if (this.config.useCookies) this.selectedNode = this.getSelected();

        str += this.addNode(this.root);

    } else str += 'Browser not supported.';

    str += '</div>';

    if (!this.selectedFound) this.selectedNode = null;

    this.completed = true;

    return str;

};



// Creates the tree structure

dTree.prototype.addNode = function(pNode) {

    var str = '';

    var n=0;

    if (this.config.inOrder) n = pNode._ai;

    for (n; n<this.aNodes.length; n++) {

        if (this.aNodes[n].pid == pNode.id) {

            var cn = this.aNodes[n];

            cn._p = pNode;

            cn._ai = n;

            this.setCS(cn);

            if (!cn.target && this.config.target) cn.target = this.config.target;

            if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);

            if (!this.config.folderLinks && cn._hc) cn.url = null;

            if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) {

                cn._is = true;

                this.selectedNode = n;

                this.selectedFound = true;

            }

            str += this.node(cn, n);

            if (cn._ls) break;

        }

    }

    return str;

};



// Creates the node icon, url and text

dTree.prototype.node = function(node, nodeId) {


    var str = '<div class="dTreeNode">' + this.indent(node, nodeId);

    if (this.config.useIcons) {

        if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);

        if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;

        if (this.root.id == node.pid) {

            node.icon = this.icon.root;

            node.iconOpen = this.icon.root;

        }

        str += '<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';

    }

    if (node.url) {

        str += '<a title="'+node.title+'" id="s' + this.obj + nodeId + '" class=" ' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '"';

        if (node.title) str += ' title="' + node.title + '"';

        if (node.target) str += ' target="' + node.target + '"';

        if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';

        if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))

            str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';

        str += '>';

    }

    else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)

        str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" class=" node">';

    str += node.name;

    if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';

    str += '</div>';

    if (node._hc) {

        str += '<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">';

        str += this.addNode(node);

        str += '</div>';

    }

    this.aIndent.pop();

    return str;

};



// Adds the empty and line icons

dTree.prototype.indent = function(node, nodeId) {

    var str = '';

    if (this.root.id != node.pid) {

        for (var n=0; n<this.aIndent.length; n++)

            str += '<img src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" alt="" />';

        (node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);

        if (node._hc) {

            str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');"><img id="j' + this.obj + nodeId + '" src="';

            if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;

            else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) );

            str += '" alt="" /></a>';

        } else str += '<img src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" alt="" />';

    }

    return str;

};



// Checks if a node has any children and if it is the last sibling

dTree.prototype.setCS = function(node) {

    var lastId;

    for (var n=0; n<this.aNodes.length; n++) {

        if (this.aNodes[n].pid == node.id) node._hc = true;

        if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;

    }

    if (lastId==node.id) node._ls = true;

};



// Returns the selected node

dTree.prototype.getSelected = function() {

    var sn = this.getCookie('cs' + this.obj);

    return (sn) ? sn : null;

};



// Highlights the selected node

dTree.prototype.s = function(id) {

    if (!this.config.useSelection) return;

    var cn = this.aNodes[id];

    if (cn._hc && !this.config.folderLinks) return;

    if (this.selectedNode != id) {

        if (this.selectedNode || this.selectedNode==0) {

            eOld = document.getElementById("s" + this.obj + this.selectedNode);

            eOld.className = "node";

        }

        eNew = document.getElementById("s" + this.obj + id);

        eNew.className = "nodeSel";

        this.selectedNode = id;

        if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);

    }

};



// Toggle Open or close

dTree.prototype.o = function(id) {

    var cn = this.aNodes[id];

    this.nodeStatus(!cn._io, id, cn._ls);

    cn._io = !cn._io;

    if (this.config.closeSameLevel) this.closeLevel(cn);

    if (this.config.useCookies) this.updateCookie();

};



// Open or close all nodes

dTree.prototype.oAll = function(status) {

    for (var n=0; n<this.aNodes.length; n++) {

        if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {

            this.nodeStatus(status, n, this.aNodes[n]._ls)

            this.aNodes[n]._io = status;

        }

    }

    if (this.config.useCookies) this.updateCookie();

};



// Opens the tree to a specific node

dTree.prototype.openTo = function(nId, bSelect, bFirst) {

    if (!bFirst) {

        for (var n=0; n<this.aNodes.length; n++) {

            if (this.aNodes[n].id == nId) {

                nId=n;

                break;

            }

        }

    }

    var cn=this.aNodes[nId];

    if (cn.pid==this.root.id || !cn._p) return;

    cn._io = true;

    cn._is = bSelect;

    if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);

    if (this.completed && bSelect) this.s(cn._ai);

    else if (bSelect) this._sn=cn._ai;

    this.openTo(cn._p._ai, false, true);

};



// Closes all nodes on the same level as certain node

dTree.prototype.closeLevel = function(node) {

    for (var n=0; n<this.aNodes.length; n++) {

        if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) {

            this.nodeStatus(false, n, this.aNodes[n]._ls);

            this.aNodes[n]._io = false;

            this.closeAllChildren(this.aNodes[n]);

        }

    }

}



// Closes all children of a node

dTree.prototype.closeAllChildren = function(node) {

    for (var n=0; n<this.aNodes.length; n++) {

        if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {

            if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);

            this.aNodes[n]._io = false;

            this.closeAllChildren(this.aNodes[n]);

        }

    }

}



// Change the status of a node(open or closed)

dTree.prototype.nodeStatus = function(status, id, bottom) {

    eDiv	= document.getElementById('d' + this.obj + id);

    eJoin	= document.getElementById('j' + this.obj + id);

    if (this.config.useIcons) {

        eIcon	= document.getElementById('i' + this.obj + id);

        eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;

    }

    eJoin.src = (this.config.useLines)?

        ((status)?((bottom)?this.icon.minusBottom:this.icon.minus):((bottom)?this.icon.plusBottom:this.icon.plus)):

        ((status)?this.icon.nlMinus:this.icon.nlPlus);

    eDiv.style.display = (status) ? 'block': 'none';

};





// [Cookie] Clears a cookie

dTree.prototype.clearCookie = function() {

    var now = new Date();

    var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);

    this.setCookie('co'+this.obj, 'cookieValue', yesterday);

    this.setCookie('cs'+this.obj, 'cookieValue', yesterday);

};



// [Cookie] Sets value in a cookie

dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) {

    document.cookie =

        escape(cookieName) + '=' + escape(cookieValue)

            + (expires ? '; expires=' + expires.toGMTString() : '')

            + (path ? '; path=' + path : '')

            + (domain ? '; domain=' + domain : '')

            + (secure ? '; secure' : '');

};



// [Cookie] Gets a value from a cookie

dTree.prototype.getCookie = function(cookieName) {

    var cookieValue = '';

    var posName = document.cookie.indexOf(escape(cookieName) + '=');

    if (posName != -1) {

        var posValue = posName + (escape(cookieName) + '=').length;

        var endPos = document.cookie.indexOf(';', posValue);

        if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));

        else cookieValue = unescape(document.cookie.substring(posValue));

    }

    return (cookieValue);

};



// [Cookie] Returns ids of open nodes as a string

dTree.prototype.updateCookie = function() {

    var str = '';

    for (var n=0; n<this.aNodes.length; n++) {

        if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) {

            if (str) str += '.';

            str += this.aNodes[n].id;

        }

    }

    this.setCookie('co' + this.obj, str);

};



// [Cookie] Checks if a node id is in a cookie

dTree.prototype.isOpen = function(id) {

    var aOpen = this.getCookie('co' + this.obj).split('.');

    for (var n=0; n<aOpen.length; n++)

        if (aOpen[n] == id) return true;

    return false;

};



// If Push and pop is not implemented by the browser

if (!Array.prototype.push) {

    Array.prototype.push = function array_push() {

        for(var i=0;i<arguments.length;i++)

            this[this.length]=arguments[i];

        return this.length;

    }

};

if (!Array.prototype.pop) {

    Array.prototype.pop = function array_pop() {

        lastElement = this[this.length-1];

        this.length = Math.max(this.length-1,0);

        return lastElement;

    }

};